Matches in Library of Congress for { ?s ?p 1981. }
- 80006215 date "1981".
- 80006218%2F%2Fr84 date "1981".
- 80006219%2F%2Fr93 date "1981".
- 80006221 date "1981".
- 80006222 date "1981".
- 80006225 date "1981".
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- 80006245 date "1981".
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- 80006255 date "1981".
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- 80006265%2F%2Fr85 date "1981".
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- 80007529%2F%2Fr863 date "1981".
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- 80007618%2F%2Fr90 date "1981".
- 80007629%2F%2Fr952 date "1981".
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- 80007827%2F%2Fr92 date "1981".
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- 80007849%2F%2Fr892 date "1981".
- 80007855%2F%2Fr82 date "1981".
- 80007856%2F%2Fr82 date "1981".
- 80007857 date "1981".
- 80007871 date "1981".
- 80007876 date "1981".
- 80007879 date "1981".